Basler BE1-11m - Page 371

9424200996 63-7
BE1-11m Instantaneous Overcurrent (50) Test
Table 63-10. Operational Settings (IG Mode)
Setting
Value
BESTCOMSPlus Screen
Description
Ground CT
Ratio
1
System Parameters, Sensing
Transformers
Sets ground CT ratio to 1
Element Mode
IG
Protection, Current, Instantaneous
Overcurrent (50-1)
Enables 50-1 function for IG
mode
Source
CT Circuit 1
Protection, Current, Instantaneous
Overcurrent (50-1)
Selects CT circuit 1 as the
source
50-1 IND GND
Enabled
Target Configuration, Targets
Enables IND GND target for
50-1
Step 2: Use BESTCOMSPlus to configure the BESTlogicPlus programmable logic shown in Figure
63-4.
• Blocking is disabled.
• OUT1 closes for 50-1 Trip.
• OUT2 closes for 50-1 Pickup.
• Fault recording is enabled.
Figure 63-4. BESTlogicPlus Settings (IG Mode)
Step 3: Use BESTCOMSPlus to open the Protection, Current, Instantaneous Overcurrent (50-1) screen
and send the low range test settings (minimum pickup setting) to the BE1-11m for your sensing
input type in Table 63-11.
Table 63-11. Pickup Test Settings (IG Mode)
Sensing Input Type Range Pickup Setting Time Delay
5 A
Low
0.5 A
0 ms
Middle
5.0 A
0 ms
High
10.0 A
0 ms
1 A or SEF
Low
0.1 A
0 ms
Middle
1.0 A
0 ms
High
2.0 A
0 ms
Step 4: Prepare to monitor the 50-1 function operation. Operation can be verified by monitoring OUT2
(see Figure 63-4).
Step 5: Connect a current source to terminals D7 and D8 (IG).
Step 6: Slowly increase the ground current until OUT2 closes and record the pickup. Verify that there is
a 50-1-IND GND target on the front-panel display. Slowly decrease the applied current until
OUT2 opens and record the dropout.